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How can I list all collections in the MongoDB shell?
... Can we please get db.listCollections() as the answer shown here and checked in green? Otherwise people are making the same mistake I did countless times when they come to this answer - and attempt to use db.getCollectionNames and the error comes back db.collectionNames is not a function....
How do I read the source code of shell commands?
I would like to read the actual source code which the linux commands are written with. I've gained some experience using them and now I think it's time to interact with my machine at a deeper level.
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Using sed, how do you print the first 'N' characters of a line?
...e first 100 characters:
cat file |colrm 101
It's been around for years and is in most linux's and bsd's (freebsd for sure), usually by default. I can't remember ever having to type apt-get install colrm.
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How do you include Xml Docs for a class library in a NuGet package?
I am creating a NuGet package for a C# class library, and I would like to include generated Xml Documentation with the library. This is my nuspec file:
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Left padding a String with Zeros [duplicate]
I've seen similar questions here and here .
20 Answers
20
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How to check if an int is a null
.... you need to do
if (person != null){ // checks if person is not null
}
and
if(person.equals(null))
The above code would throw NullPointerException when person is null.
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Rails 4 Authenticity Token
...fault, \Rails resets the session when it finds an unverified request.
def handle_unverified_request
reset_session
end
In Rails 4:
def handle_unverified_request
forgery_protection_strategy.new(self).handle_unverified_request
end
Which will call the following:
def handle_unverified_request
...
How to style a JSON block in Github Wiki?
...o, one can previously rely on an external service such as jsbeautifier.org and paste the prettified result in the wiki.
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Remove multiple elements from array in Javascript/jQuery
...removeValFromIndex[i],1);
Go through removeValFromIndex in reverse order and you can .splice() without messing up the indexes of the yet-to-be-removed items.
Note in the above I've used the array-literal syntax with square brackets to declare the two arrays. This is the recommended syntax because...
“Ago” date/time functions in Ruby/Rails
...om_time, to_time)
time_ago_in_words(from_time)
Check the API for details and more options.
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